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脱式计算.0.25×9.87×436.7×2.1+10.88.45-0.45×0.10.544÷0.16+0.8412.6÷0.28+2.3×4.48.4×1.8+8.4×8.1

题目详情
脱式计算.
0.25×9.87×4            36.7×2.1+10.8           8.45-0.45×0.1
0.544÷0.16+0.84        12.6÷0.28+2.3×4.4       8.4×1.8+8.4×8.1
▼优质解答
答案和解析
(1)0.25×9.87×4
=(0.25×4)×9.87
=1×9.87
=9.87

(2)36.7×2.1+10.8
=77.07+10.8
=87.87

(3)8.45-0.45×0.1
=8.45-0.045
=8.405

(4)0.544÷0.16+0.84
=3.4+0.84
=4.24

(5)12.6÷0.28+2.3×4.4
=45+10.12
=55.12

(6)8.4×1.8+8.4×8.1
=8.4×(1.8+8.1)
=8.4×9.9
=8.4×(10-0.1)
=8.4×10-8.4×0.1
=84-0.84
=83.16