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脱式计算(1)87.4×27.6+87.4×72.4(2)2÷2.5+2.5÷2(3)(1.25-0.125)×8.

题目详情
脱式计算
(1)87.4×27.6+87.4×72.4
(2)2÷2.5+2.5÷2
(3)(1.25-0.125)×8.
▼优质解答
答案和解析
(1)87.4×27.6+87.4×72.4,
=87.4×(27.6+72.4),
=87.4×100,
=8740;

(2)2÷2.5+2.5÷2,
=0.8+1.25,
=2.05;

(3)(1.25-0.125)×8,
=1.25×8-0.125×8,
=10-1,
=9.