all#video#mental-math#arithmetic#algebra#story#geometry#fractions#number-theory#percentages#powers#combinatorics#linear-equations#sequences#statistics#roots#calculus#probability#area#speed#multi-part#money#multiplication#quadratics#logarithms#exponents#seconde#time#logic#rounding#social-arithmetic#geometric#ratio#classic
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M@ms.riveraLv 3#powers#multi-part
๐ŸงŠ Cubes โ€” evaluate each:
23=2^3 =
33=3^3 =
43=4^3 =
53=5^3 =
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M@math.classLv 4#number-theory#video#multi-part
๐Ÿ”ข GCD and LCM โ€” evaluate each:
gcdโก(12,18)=\gcd(12, 18) =
gcdโก(24,36)=\gcd(24, 36) =
lcm(4,6)=\text{lcm}(4, 6) =
lcm(3,5)=\text{lcm}(3, 5) =
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M@ms.riveraLv 3#powers#multi-part
โšก Powers of 2 โ€” evaluate each:
23=2^3 =
25=2^5 =
28=2^8 =
210=2^{10} =
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M@ms.riveraLv 4#percentages#video#multi-part
๐Ÿ’ฏ Percentages II โ€” find each:
15%ย ofย 300=15\% \text{ of } 300 =
30%ย ofย 90=30\% \text{ of } 90 =
5%ย ofย 200=5\% \text{ of } 200 =
120%ย ofย 50=120\% \text{ of } 50 =
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M@mr.deanLv 3#roots#multi-part
๐ŸŒฑ Square roots โ€” evaluate each:
49=\sqrt{49} =
81=\sqrt{81} =
144=\sqrt{144} =
225=\sqrt{225} =
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M@mr.deanLv 2#mental-math#arithmetic#multi-part
๐Ÿงฎ Quick arithmetic โ€” evaluate each:
45+55=45 + 55 =
1000โˆ’250=1000 - 250 =
60ร—5=60 \times 5 =
144รท12=144 \div 12 =
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M@ms.riveraLv 3#arithmetic#multi-part
โž– Negative numbers โ€” evaluate each:
โˆ’5+8=-5 + 8 =
3โˆ’10=3 - 10 =
โˆ’4ร—3=-4 \times 3 =
โˆ’20รท5=-20 \div 5 =
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M@mr.deanLv 3#mental-math#multi-part
๐Ÿ” Double and halve โ€” evaluate each:
2ร—64=2 \times 64 =
128รท2=128 \div 2 =
2ร—256=2 \times 256 =
1000รท8=1000 \div 8 =
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M@mr.deanLv 3#fractions#multi-part
๐Ÿ• Fraction of a number โ€” evaluate each:
12ร—50=\frac{1}{2} \times 50 =
13ร—90=\frac{1}{3} \times 90 =
23ร—60=\frac{2}{3} \times 60 =
34ร—100=\frac{3}{4} \times 100 =
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M@mr.deanLv 3#mental-math#arithmetic#multi-part
๐Ÿ”ข Order of operations โ€” evaluate each, in order:
2+3ร—4=2 + 3 \times 4 =
(2+3)ร—4=(2 + 3) \times 4 =
20โˆ’12รท4=20 - 12 \div 4 =
2ร—32=2 \times 3^2 =
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M@math.classLv 3#powers#multi-part
๐Ÿ”ฒ Squares โ€” evaluate each:
112=11^2 =
122=12^2 =
132=13^2 =
152=15^2 =
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M@math.classLv 3#mental-math#multiplication#multi-part
โœ–๏ธ Times tables โ€” evaluate each:
12ร—12=12 \times 12 =
13ร—4=13 \times 4 =
15ร—6=15 \times 6 =
25ร—8=25 \times 8 =
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M@math.classLv 3#fractions#multi-part
๐Ÿฐ Simplify each fraction (as a fraction):
24=\frac{2}{4} =
69=\frac{6}{9} =
1520=\frac{15}{20} =
416=\frac{4}{16} =
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M@ms.riveraLv 3#percentages#multi-part
๐Ÿ’ฏ Percentages โ€” find each:
10%ย ofย 200=10\% \text{ of } 200 =
25%ย ofย 80=25\% \text{ of } 80 =
50%ย ofย 90=50\% \text{ of } 90 =
20%ย ofย 150=20\% \text{ of } 150 =
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M@mr.deanLv 4#fractions#video#multi-part
โž• Add the fractions (as a fraction):
12+14=\frac{1}{2} + \frac{1}{4} =
13+16=\frac{1}{3} + \frac{1}{6} =
25+15=\frac{2}{5} + \frac{1}{5} =
12+13=\frac{1}{2} + \frac{1}{3} =
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M@mr.deanLv 4#algebra#video#multi-part
๐Ÿ”ค Combine like terms โ€” simplify each (type like 5x):
2x+3x=2x + 3x =
7yโˆ’2y=7y - 2y =
4a+a=4a + a =
10mโˆ’6m=10m - 6m =
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M@math.classLv 4#arithmetic#video#multi-part
๐Ÿงฎ Order of operations II โ€” evaluate each:
100โˆ’5ร—5=100 - 5 \times 5 =
(8+2)ร—(7โˆ’3)=(8 + 2) \times (7 - 3) =
6+6รท6+6=6 + 6 \div 6 + 6 =
23+4ร—5=2^3 + 4 \times 5 =
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M@math.classLv 3#powers#roots#multi-part
๐Ÿ“ Squares and roots โ€” evaluate each:
100=\sqrt{100} =
169=\sqrt{169} =
142=14^2 =
202=20^2 =
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M@ms.riveraLv 4#algebra#powers#video#multi-part
๐Ÿ”ฃ Exponent laws โ€” simplify each (type like x^5):
x2โ‹…x3=x^2 \cdot x^3 =
x7รทx2=x^7 \div x^2 =
(x2)4=(x^2)^4 =
x5โ‹…x=x^5 \cdot x =
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M@ms.riveraLv 5#fractions#video#multi-part
โœ‚๏ธ Multiply and divide fractions (as a fraction):
12ร—12=\frac{1}{2} \times \frac{1}{2} =
23ร—34=\frac{2}{3} \times \frac{3}{4} =
12รท14=\frac{1}{2} \div \frac{1}{4} =
34รท12=\frac{3}{4} \div \frac{1}{2} =