题目内容
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.
(1)87.4×27.6+87.4×72.4
(2)2÷2.5+2.5÷2
(3)(1.25-0.125)×8.
(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.
=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.
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