Question

100道简便计算，及答案。

Answer 1

300÷125÷8
=300÷（125×8）
=300÷1000
=0.3
396-96-172-28
=（396-96）-（172+28）
= 300-200
= 100
125*24
= 125*8*3
= 1000*3
= 3000
26*15
= （20+6）*15
= 20*15 + 6*15
= 300+90
=390
25*99*4
= 25*4*99
= 100*99
= 9900
250*32
= 250*4*8
= 1000*8
= 8000
（98+98+98+98）*25
= 4*98*25
= 4*25*98
= 100*98
= 9800

Answer 2

300÷125÷8
=300÷（125×8）
=300÷1000
=0.3

Answer 3

125*64=8000 342*24=8208
612*54=33048 578*34=19652
645*34=21930 34584*548=18952032

Answer 4

300÷125÷8
=300÷(125×8)
=300÷1000
=0.3

396-96-172-28
=(396-96)-(172+28)
= 300-200
= 100

125*24
= 125*8*3
= 1000*3
= 3000

360÷24
=360÷6÷4
=60÷4
=15

240÷48
=240÷24÷2
=10÷2
=5

27+456+73
＝(27+73)+456
＝100+456
＝556

24÷4+56÷4
＝(24+56)÷4
＝80÷4
＝20

2.5×0.7×0.8
＝(2.5×0.8)×0.7
＝60×0.7
＝42
800÷32
=800÷8÷4
=100÷4
=25

630÷42
=630÷6÷7
=105÷5
=15