用最喜欢的方法计算 12.5×38×0.8 (8.5-4)×(0.32÷1.6) 6.5×4.6+6.5×15.4 9 8
用最喜欢的方法计算12.5×38×0.8(8.5-4)×(0.32÷1.6)6.5×4.6+6.5×15.498÷[34÷(1-18)]....
用最喜欢的方法计算 12.5×38×0.8 (8.5-4)×(0.32÷1.6) 6.5×4.6+6.5×15.4 9 8 ÷[ 3 4 ÷(1- 1 8 ) ].
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(1)12.5×38×0.8, =(12.5×0.8)×38, =10×38, =380; (2)(8.5-4)×(0.32÷1.6), =4.5×0.2, =0.9; (3)6.5×4.6+6.5×15.4, =6.5×(4.6+15.4), =6.5×20, =130; (4)
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