Question

几道数学题

99*65
35*68+68+68+68*64
简便,谢谢

Answer 1

这样的计算主要是利用运算定律凑整，使计算简便。]

1、99*65=(100-1)*65=100*65-1*65=6500-65=6435

2、35*68+68+68+68*64
=35*68+1*68+68*64+68
=(35+1+64)*68+68
=100*68+68
=6800+68
=6868

Answer 2

99*65 =(100-1)*65 =100*65 -65 =6500-65 =6435

35*68+68+68+68*64=68*(35+1+1+64)=68*101=6868.

Answer 3

99*65 =(100-1)*65=6500-65=6435
35*68+68+68+68*64=68*(35+1+1+64)=68*(100+1)=6800+68=6868

Answer 4

99*65＝(100-1)*65＝6500-65＝6435

35*68+68+68+68*64 ＝68*(35+1+1+64)＝68*101＝6868

Answer 5

99*65 =(100-1)×65=6500-65=6435
35*68+68+68+68*64 = 68*(35+1+1+64)=68*(100+1)=6868