计算.(1)3.6-[(7.5-5.7)×0.2](2) 9÷( 1 2 - 1 4 + 1 8 )-3×7 (3
计算.(1)3.6-[(7.5-5.7)×0.2](2)9÷(12-14+18)-3×7(3)123×(12-13)÷16×3(4)[845-(0.6+2910)×47]...
计算.(1)3.6-[(7.5-5.7)×0.2](2) 9÷( 1 2 - 1 4 + 1 8 )-3×7 (3) 1 2 3 ×( 1 2 - 1 3 )÷ 1 6 ×3 (4) [8 4 5 -(0.6+2 9 10 )× 4 7 ]÷1.7 .
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错旴
推荐于2016-04-14
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(1)3.6-[(7.5-5.7)×0.2], =3.6-[1.8×0.2], =3.6-0.36, =3.24;
(2) 9÷( - + )-3×7 , =9÷ -3×7, =24-21, =3;
(3) 1 ×( - )÷ ×3 , = × ÷ ×3, =( ×3)×( ÷ ), =5×1, =5;
(4) [8 -(0.6+2 )× ]÷1.7 , = [8 -3.5× ]÷1.7 , = [8 -2]÷1.7 , =6.8÷1.7, =4. |
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