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简介:
25秋五年级上册数学小数简便计算题
3.25×0.45+6.75×0.45
=0.45×(3.25+6.75)
=0.45×10
=4.5
2.15+8.73+1.27+7.85
=(2.15+7.85)+(8.73+1.27)
=10+10
=20
11.87﹣(8.2+1.87)
=11.87﹣1.87﹣8.2
=10﹣8.2
=1.8
4.38﹣1.56+0.62﹣0.44
=(4.38+0.62)﹣(1.56+0.44)
=5﹣2
=3
0.4×270×2.5
=(0.4×2.5)×270
=270
(40+1.25)×8
=40×8+1.25×8
=320+10
=330