计算题25×33×4×2 156+6.2-15.6+6.2 &...
计算题25×33×4×2156+6.2-15.6+6.2125×89×8283×5+17×543×102428×78+572×789+99+999+9999286+879...
计算题25×33×4×2 156+6.2-15.6+6.2 125×89×8283×5+17×5 43×102 428×78+572×789+99+999+9999 286+879-679 333×334+999×222
展开
1个回答
展开全部
①25×33×4×2
=(25×4)×(33×2)
=100×66
=6600
②156+6.2-15.6+6.2
=(156-15.6)+(6.2+6.2)
=140.4+12.4
=152.8
③125×89×8
=125×8×89
=1000×89
=89000
④283×5+17×5
=5×(283+17)
=5×300
=1500
⑤43×102
=43×(100+2)
=43×100+43×2
=4300+86
=4386
⑥428×78+572×78
=78×(428+572)
=78×1000
=78000
⑦9+99+999+9999
=10-1+100-1+1000-1+1000-1
=11110-4
=11106
⑧286+879-679
=286+(879-679)
=286+200
=486
⑨333×334+999×222
=333×334+333×666
=333×(334+666)
=333×1000
=333000
=(25×4)×(33×2)
=100×66
=6600
②156+6.2-15.6+6.2
=(156-15.6)+(6.2+6.2)
=140.4+12.4
=152.8
③125×89×8
=125×8×89
=1000×89
=89000
④283×5+17×5
=5×(283+17)
=5×300
=1500
⑤43×102
=43×(100+2)
=43×100+43×2
=4300+86
=4386
⑥428×78+572×78
=78×(428+572)
=78×1000
=78000
⑦9+99+999+9999
=10-1+100-1+1000-1+1000-1
=11110-4
=11106
⑧286+879-679
=286+(879-679)
=286+200
=486
⑨333×334+999×222
=333×334+333×666
=333×(334+666)
=333×1000
=333000
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询