早教吧作业答案频道 -->其他-->
用简便计算。2.02x8.51.25+4.6+0.751.6x7.5x1.25用简便计算。2.02x8.51.25+4.6+0.751.6x7.5x1.2556x1.253.4x7x1.50.8x0.25x0.4x12.5
题目详情
用简便计算。2.02x8.5 1.25+4.6+0.75 1.6x7.5x1.25
用简便计算。2.02x8.5 1.25+4.6+0.75 1.6x7.5x1.25 56x1.25 3.4x7x1.5 0.8x0.25x0.4x12.5
用简便计算。2.02x8.5 1.25+4.6+0.75 1.6x7.5x1.25 56x1.25 3.4x7x1.5 0.8x0.25x0.4x12.5
▼优质解答
答案和解析
2.02x8.5
=(2+0.02)*8.5
=2*8.5+0.02*8.5
=17+0.17
=17.17
1.25+4.6+0.75
=(1.25+0.75)+4.6
=2+4.6
=6.6
1.6x7.5x1.25
=0.8*2*7.5*1.25
=(0.8*1.25)*(2*7.5)
=1*15
=15
56x1.25
=7*(8*1.25)
=7*10
=70
3.4x7x1.5
= 3.4*(7*1.5)
= 3.4*10.5
=3.4*(10+0.5)
=3.4*10+3.4*0.5
=34+1.7
=35.7
0.8x0.25x0.4x12.5
=(0.8*12.5)*(0.25*0.4)
=10*0.1
=1
=(2+0.02)*8.5
=2*8.5+0.02*8.5
=17+0.17
=17.17
1.25+4.6+0.75
=(1.25+0.75)+4.6
=2+4.6
=6.6
1.6x7.5x1.25
=0.8*2*7.5*1.25
=(0.8*1.25)*(2*7.5)
=1*15
=15
56x1.25
=7*(8*1.25)
=7*10
=70
3.4x7x1.5
= 3.4*(7*1.5)
= 3.4*10.5
=3.4*(10+0.5)
=3.4*10+3.4*0.5
=34+1.7
=35.7
0.8x0.25x0.4x12.5
=(0.8*12.5)*(0.25*0.4)
=10*0.1
=1
看了 用简便计算。2.02x8.5...的网友还看了以下:
1.先观察下面题的做法,然后回答下列问题:丨-7/3/8+4/1/2丨-18/1/4+丨-6-1/ 2020-05-23 …
计算下面各题,能简算的要简算:(1)7.29*4.6+46*2.71(2)2分之1÷3分之2*(8 2020-06-14 …
102×4×5=3×(92-74)=120×2×3=81÷9×67=5×143-276=7×125 2020-07-18 …
分数混合运算,脱式计算,能简算的要简算!一个小时内打出来加分!1.5/6+2/9*3/4+2/32 2020-07-19 …
19.4×6.1×2.3简便5.67×0.2-0.6218.1×0.92+3.930.4×0.7× 2020-07-19 …
19.4×6.1×2.3简便5.67×0.2-0.6218.1×0.92+3.930.4×0.7× 2020-07-19 …
直接写得数.2.5×4=0.25×3=2.8×0.2=2.4÷0.3=4.6÷0.2=0.32÷0. 2020-11-19 …
极数计算(要过程)1/1*3+1/3*5+1/5*7+.+1/2003*2005=?1/2+1/2+ 2020-11-19 …
第一题1~9整数中可重复地随机取6个数组成6位数,求6个数中5恰好出现4次的概率,P=C(4,6)* 2020-11-24 …
速算小能手.5.3+6.7=9.5-0.6=6.9-2.7=4.7+4.4=8.7-7.1=5.9+ 2020-12-08 …