Question

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Answer 1

a, 204 - 72 : 12=204 - 6=198

$b, 15 \times 2^{3} + 4 \times 3^{2} - 5 \times 7 = 15 \times 8 + 4 \times 9 - 35 = 120 + 36 - 35 = 121 c, 3^{5} : 3^{2} + 2^{3} \times 2^{2} = 3^{3} + 2^{5} = 27 + 32 = 59 d, 6^{3} \times 57 + 43 \times 6^{3} = 6^{3} \times (57 + 43) = 216 \times 100 = 21600 e, 21 \times 7 + 21 \times 2 - 11 \times (3^{5} : 3^{3}) = 21 \times (7 + 2) - 11 \times 3^{2} = 21 \times 9 - 11 \times 9 = 9 \times (21 - 11) = 9 \times 10 = 90$

$g, 327 - 27 \times [(3^{3} + 2020^{0}) : 7 - 2] = 327 - 27 \times [(27 + 1) : 7 - 2] = 327 - 27 \times (28 : 7 - 2) = 327 - 27 \times (4 - 2) = 327 - 27 \times 2 = 327 - 54 = 273$ .

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Answer 2

a, 204 - 72 : 12=204 - 6=198

$b, 15 \times 2^{3} + 4 \times 3^{2} - 5 \times 7 = 15 \times 8 + 4 \times 9 - 35 = 120 + 36 - 35 = 121 c, 3^{5} : 3^{2} + 2^{3} \times 2^{2} = 3^{3} + 2^{5} = 27 + 32 = 59 d, 6^{3} \times 57 + 43 \times 6^{3} = 6^{3} \times (57 + 43) = 216 \times 100 = 21600 e, 21 \times 7 + 21 \times 2 - 11 \times (3^{5} : 3^{3}) = 21 \times (7 + 2) - 11 \times 3^{2} = 21 \times 9 - 11 \times 9 = 9 \times (21 - 11) = 9 \times 10 = 90$

$g, 327 - 27 \times [(3^{3} + 2020^{0}) : 7 - 2] = 327 - 27 \times [(27 + 1) : 7 - 2] = 327 - 27 \times (28 : 7 - 2) = 327 - 27 \times (4 - 2) = 327 - 27 \times 2 = 327 - 54 = 273$ .

Answer 3

a, 204 - 72 : 12=204 - 6=198

b, 15×23+4×32−5×7=15×8+4×9−35=120+36−35=121c, 35:32+23×22=33+25=27+32=59d, 63×57+43×63=63×(57+43)=216×100=21600e, 21×7+21×2−11×(35:33)=21×(7+2)−11×32=21×9−11×9=9×(21−11)=9×10=90b, 15×23+4×32-5×7=15×8+4×9-35=120+36-35=121c, 35:32+23×22=33+25=27+32=59d, 63×57+43×63=63×57+43=216×100=21600e, 21×7+21×2-11×35:33=21×7+2-11×32=21×9-11×9=9×21-11=9×10=90

g, 327−27×[(33+20200):7−2]=327−27×[(27+1):7−2]=327−27×(28:7−2)=327−27×(4−2)=327−27×2=327−54=273

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