8.23×8.6+1.4×8.23的简便运算
计算下列各题,能简算的要简算.(1)3.2×0.25×1.25(2)8.23×8.6+1.4×8.23(3)15.58÷8.2-0.72(4)8.4÷0.21÷0.5....
计算下列各题,能简算的要简算.
(1)3.2×0.25×1.25 (2)8.23×8.6+1.4×8.23
(3)15.58÷8.2-0.72 (4)8.4÷0.21÷0.5. 展开
(1)3.2×0.25×1.25 (2)8.23×8.6+1.4×8.23
(3)15.58÷8.2-0.72 (4)8.4÷0.21÷0.5. 展开
1个回答
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(1)3.2×0.25×1.25
=(4×0.25)×(0.8×1.25)
=1×1
=1;
(2)8.23×8.6+1.4×8.23
=8.23×(8.6+1.4)
=8.23×10
=82.3;
(3)15.58÷8.2-0.72
=1.9-0.72
=1.18;
(4)8.4÷0.21÷0.5
=40÷0.5
=80.
=(4×0.25)×(0.8×1.25)
=1×1
=1;
(2)8.23×8.6+1.4×8.23
=8.23×(8.6+1.4)
=8.23×10
=82.3;
(3)15.58÷8.2-0.72
=1.9-0.72
=1.18;
(4)8.4÷0.21÷0.5
=40÷0.5
=80.
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