數(shù)學(xué)五年級下冊簡便運算習(xí)題
簡便運算是五年級下冊數(shù)學(xué)學(xué)習(xí)的重點，下面就是小編為大家整理的五年級下冊數(shù)學(xué)簡便運算練習(xí)題，希望對大家有所幫助!
習(xí)題一
1、5.76+13.67+4.24+6.33
=(5.76+4.24)+(13.67+6.33)
=10+10
=20
2、37.24+23.79-17.24
=37.24-17.24+23.79
=20+23.79
=43.79
3、 4×3.78×0.25
=4×0.25×3.78
=1×3.78
=3.78
4、 125×246×0.8
=125×0.8×246
=100×246
=24600
5、(2.5+12.5)×40
=2.5×40+12.5×40
=100+500
=600
6、3.68×4.79+6.32×4.79
=(3.68+6.32)×4.79
=10×4.79
=47.9
7. 26.86×25.66-16.86×25.66
=(26.86-16.86) ×25.66
=10×25.66
=256.6
8、 5.7×99+5.7
= 5.7×(99+1)
=5.7×100
=570
習(xí)題二
9、34×9.9
=34×(10-0.1)
=34×10-34×0.1
=340-3.4
=336.6
10、 57×101
=57×(100+1)
=57×100+57×1
=5757
11、7.8×1.1
=7.8×(1+0.1)
=7.8×1+7.8×0.1
=7.8+0.78
=8.58
12、25×32
=25×4×8
=100×8
=800
13、125×0.72
=125×8×0.09
=1000×0.09
=90
14、87×2/85
=(85+2) ×2/85
=85×2/85+2×2/85
=2+4/85
=2又4/85
15、56.5-3.7-6.3
=56.5-(3.7+6.3)
=56.5-10
=46.5
16、32.6÷0.4÷2.5
=32.6÷(0.4×2.5)
=32.6÷1
=32.6
16、86.7×0.356+1.33×3.56
=8.67×3.56+1.33×3.56
=(8.67+1.33)×3.56
=10×3.56
=35.6
17、15.6÷4-5.6×1/4
=15.6×1/4-5.6×1/4
=(15.6-5.6)×1/4
=10×1/4
=2又1/2
18、16/23×27+16×19/23
=27/23×16+16×19/23
=16×(27/23+19/23)
=16×2
=32
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