用你喜欢的方法进行计算. 78-4.5+22-451/2 11×11×11-11×11-10 1/4×(4.85÷5/18-3.6+6.15×33/5)
问题描述:
用你喜欢的方法进行计算.
78-4.5+22-45
1 2
11×11×11-11×11-10
×(4.85÷1 4
-3.6+6.15×35 18
) 3 5
答
(1)78-4.5+22-45
1 2
=78-4.5+22-45.5
=(78+22)-(4.5+45.5)
=100-50
=50
(2)11×11×11-11×11-10
=11×11×(11-1)-10
=11×11×10-10
=10×(11×11-1)
=10×(121-1)
=10×120
=1200
(3)
×(4.85÷1 4
-3.6+6.15×35 18
)3 5
=
×(4.85×3.6-3.6+6.15×3.6)1 4
=
×3.6×(4.85-1+6.15)1 4
=0.9×10
=9