Question

计算下列各题，能简算的要简算：0.25*6.25*400 36.5*21.5-11.5*36.5 49.5*101 5.7*2.8+6.2*5.7+5.7

拜托了，急急急急急急急急急急急急急急急急急急急急急
一共有四道题哦！！！看清楚点儿哦

Answer 1

1题
0.25×6.25×400
=0.25×6.25×4×100
=(0.25×4)×(6.25×100)
=1×625
=625
2题
36.5×21.5-11.5×36.5
=36.5×21.5-36.5×11.5
=36.5×(21.5-11.5)
=36.5×10
=365
3题
49.5×101
=49.5×(100+1)
=49.5×100+49.5×1
=4950+49.5
=4999.5
4题
5.7×2.8+6.2×5.7+5.7
=5.7×2.8+5.7×6.2+5.7×1
=5.7×(2.8+6.2+1)
=5.7×10
=57

追问

真不知道采纳哪一个才好

Answer 2

5555555555555

追问

你哭什么哭嘛？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？

Answer 3

1/ 0.25×6.25×400
=0.25×6.25×4×100
=(0.25×4)×(6.25×100)
=1×625
=625
2/ 36.5×21.5-11.5×36.5
=36.5×21.5-36.5×11.5
=36.5×(21.5-11.5)
=36.5×10
=365
3/ 49.5×101
=49.5×(100+1)
=49.5×100+49.5×1
=4950+49.5
=4999.5
4/ 5.7×2.8+6.2×5.7+5.7
=5.7×2.8+5.7×6.2+5.7×1
= 5.7×(2.8+6.2+1)
=5.7×10
=57

追问

真不知道采纳哪一个才好