Question

简便运算

243-98

7.6÷0.5÷2

5.6×101

47-47×100分之99

18.8-7.4+2.2-4.6

3.5×2.76-1.5×27.6

24×（4分之1+12分之7+3分之1）

要过程，不要直接写答案，谢谢

Answer 1

243-98
=243-(100-2)
=243-100+2
=143+2
=145

7.6÷0.5÷2
=7.6÷(0.5×2)
=7.6÷1
=7.6

5.6×101
=5.6×(100+1)
=5.6×100+5.6×1
=560+5.6
=565.6

47-47×100分之99
=47×(1-100分之99)
=47×(100分之1)
=0.47

18.8-7.4+2.2-4.6
=(18.8+2.2)-(7.4-4.6)
=21-12
=9

3.5×2.76-1.5×27.6
=3.5×2.76-1.5×10×2.76
=3.5×2.75-15×2.76
=(3.5-15)×2.76
=11.5×2.76
=31.74

24×（4分之1+12分之7+3分之1）
=24×4分之1+24×12分之7+24×3分之1
=6+14+8
=28

Answer 2

243-98=243-(100-2)=243-100+2=143+2=145

7.6÷0.5÷2=7.6÷(0.5*2)=7.6÷1=7.6

5.6×101 =5.6*(100+1)=5.6*100+5.6*1=560+5.6=565.6

47-47×99/100=47-47*(1-1/100)=47-(47-0.47)=47-47+0.47=0.47

18.8-7.4+2.2-4.6=(18.8+2.2)-(7.4+4.6)=21-12=9

3.5×2.76-1.5×27.6= (这道题似乎有抄错，答案有点复杂，不写了。参见楼上-_-!)

24×（1/4+7/12+1/3）=24*1/4+24*7/12+24*1/3=6+14+8=28

Answer 3

Answer 4

Answer 5

11.5-9.02等于多少