1.72-0.3=
1.8+0.02=
0.56÷7=
7.73+2.07=
3.5×40=
5÷20=
9.5÷(2.5×4)=
2.6×23=
372÷36=
7.08×34=
918÷25=
5.4×25=
1508÷29=
0.25+0.5=
4.7-0.7=
1.2×5=
9÷0.3=
0.25a+0.5a=
7.8÷6=
1.2×0.5=
7-1.99=
62.4-4=
0.25a+0.05×2=
0.4+8.7= 4.5+3.6= 0.28+0.54= 1.4-0.9=
7.1-3.5= 5-2.7= 5.1-1.49= 15.3-4.8=
175-50= 167+90= 1.6×3= 96÷3=
0.75+0.5= 2.17-0.7= 3.03×3= 6.82÷2=
1.5-0.7= 0.37+0.9= 0.25×4= 1.27÷10=
每立方厘米的质量
单位: (克)
铝
2.70
铜
8.92
锡
7.28
锌
7.14
银
10.5
铅
11.3
铁
7.86