脱式计算,能简算的要简算.3.6×7.8+3.6×2.2 10.1×5.4 5.8×9.2...
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解决时间 2021-11-13 11:48
- 提问者网友:未信
- 2021-11-13 03:48
脱式计算,能简算的要简算.3.6×7.8+3.6×2.2 10.1×5.4 5.8×9.2...
最佳答案
- 五星知识达人网友:末日狂欢
- 2021-11-13 03:54
(1)3.6×7.8+3.6×2.2
=3.6×(7.8+2.2)
=3.6×10
=36;
(2)10.1×5.4
=(10+0.1)×5.4
=10×5.4+0.1×5.4
=54+0.54
=54.54;
(3)5.8×9.24-8.24×5.8
=5.8×(9.24-8.24)
=5.8×1
=5.8;
(4)2.5×8.9×0.4
=(2.5×0.4)×8.9
=1×8.9
=8.9;
(5)101.9×0.8-1.9×0.8
=(101.9-1.9)×0.8
=100×0.8
=80;
(6)2.37+4.6+1.63+5.4
=(2.37+1.63)+(4.6+5.4)
=4+10
=14.
=3.6×(7.8+2.2)
=3.6×10
=36;
(2)10.1×5.4
=(10+0.1)×5.4
=10×5.4+0.1×5.4
=54+0.54
=54.54;
(3)5.8×9.24-8.24×5.8
=5.8×(9.24-8.24)
=5.8×1
=5.8;
(4)2.5×8.9×0.4
=(2.5×0.4)×8.9
=1×8.9
=8.9;
(5)101.9×0.8-1.9×0.8
=(101.9-1.9)×0.8
=100×0.8
=80;
(6)2.37+4.6+1.63+5.4
=(2.37+1.63)+(4.6+5.4)
=4+10
=14.
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