计算(1) [(0.05+ 1 4 )÷0.25-40%]× 1 8 (2) [4 1 2 -(0.5+ 1 3
计算(1)[(0.05+14)÷0.25-40%]×18(2)[412-(0.5+13)÷527]×0.125(3)6.4×1.3+1÷1013+1310×135(4)7...
计算(1) [(0.05+ 1 4 )÷0.25-40%]× 1 8 (2) [4 1 2 -(0.5+ 1 3 )÷ 5 27 ]×0.125 (3) 6.4×1.3+1÷ 10 13 + 13 10 × 13 5 (4) 7.4× 5 4 +125%×2.5+ 5 4 ÷10 .
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(1) [(0.05+
=[(0.05+0.25)÷0.25-40%]×
=[0.3÷0.25-40%]×
=[1.2-0.4]×
=0.8×
=0.1; (2) [4
=[4
=[4
=[4
=0×0.125, =0; (3) 6.4×1.3+1÷
=6.4×1.3+1×1.3+1.3×2.6, =(6.4+1+2.6)×1.3, =10×1.3, =13; (4) 7.4×
=7.4×1.25+1.25×2.5+1.25×0.1, =(7.4+2.5+0.1)×1.25, =10×1.25, =12.5. |
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