4×1.5= 44÷11= 5×24= 1.2+7.8=
12÷0.1= 200÷1000= 6÷1.5= 0.5×6=
3.14×8=
31.4÷3.14=
16×3.14=
12.56÷3.14=
3.14×64=
100.48÷3.14=
60×3.14=
3.14×202=
4x-3x=
5a× a=
8b÷2=
4.5+5=
1.25×80
0.03÷0.01=
0.9-0.09=
23m-11.2m-0.8m=
15.75÷2.1= 4.23÷1.2=
4.8+6= 0.8×0.6= 2.4×0.5= 1.25×8=
4.5-0.45= 3÷0.5= 63÷0.9= 1.2÷6=
2.5×40= 0.63÷0.7= 5.7+4.23= 42=
5.8×5= 1- = 1- = 63=
17.2+2.8= 0.6×0.9= 8÷0.8= 8×1.25= 72.5×3.8×0=
123÷100= 0.74×100= 2.7÷3= 11.5-4.5= 1.4×2.5×4=
排碳计算公式
家用自来水二氧化碳排放量(kg)=使用量(t)x0.91
开私家车的二氧化碳排放量(kg)=耗油量(L)×2.7
+ = 0.24×5= 4.8÷10%= 20×( + )= 36×25%=
12.6÷0.3= ×2.4= - ×0= 632÷69≈ 7.99×9.99%≈
2.5×4= 10-3.7= 5.6×10%=
37+25= 0.8÷0.002= 81÷3=
3.2÷0.01= 2.2×9.9= 305-199=
2.05×4= 8×12.5%=