问题
计算题
用简便方法计算。
|
答案
(1)原式=15.3+4.7+(0.86+0.14)
=20+1
=21(2)原式=8×(147+53)
=8×200
=1600
(3)原式=125×8×2×5
=1000×10
=10000
(4)原式 =25.3-(8.1+10.9)=25.3-19
=6.3(5)原式=98×(100-1)
=9800-98
=9702
用简便方法计算。
|
(1)原式=15.3+4.7+(0.86+0.14)
=20+1
=21(2)原式=8×(147+53)
=8×200
=1600
(3)原式=125×8×2×5
=1000×10
=10000
(4)原式 =25.3-(8.1+10.9)=25.3-19
=6.3(5)原式=98×(100-1)
=9800-98
=9702