Đáp án:
Giải thích các bước giải:
b)
`48.19+48.115+134.52= 48(19+115)+134.52= 48.134+134.52=134(48+52)=134.100=13400`
c)
` 35.23+35.41+64.65= 35(23+41)+64.65=35.64+64.65=64(65+35)=64.100=6400`
d)
` 27.121-87.27+73.34= 27(121-87)+73.74=27.34+73.34=34(73+27)=34.100=3400`
e)
`136.23+136.17-40.36=136(23+17)-40.36=136.40-40.36=40(136-36)=40.100=4000`
f)
`17.93+116.83+17.23=17(93+23)+116.83=17.116+116.83=116(17.83)=116.100=11600`
g)
`27:{390:[500-(125+35.7)]}= 27:{390:[500-(125+245)]}= 27:{390:[500-370]}=27:{390 :130}=27:3=9`
