4 × 7.6-8-5.7, 198 × 0.51, 1.5 × 0.75, and those that can be calculated simply should be calculated simply Come on, wait online!

4 × 7.6-8-5.7, 198 × 0.51, 1.5 × 0.75, and those that can be calculated simply should be calculated simply Come on, wait online!

2.4×7.6-8-5.7=
=18.24-13.7
=4.54
198×0.51
=（200-2）*0.51
=200*0.51-2*0.51
=102-1.02
=100.98
1.5×0.75
=15/10*3/4
=45/40

(12 × 2.1 × 75 × 102) / (15 × 4 × 0.7 × 51) simple calculation, due tomorrow!

(12×2.1×75×102)÷(15×4×0.7×51)=(4×3×0·7×3×15×5×51×2)÷(15×4×0.7×51)=[(3×3×5×2)×(15×4×0.7×51)]÷(15×4×0.7×51)=(3×3×5×2)×[(15×4×0.7×51)÷(15×4×0.7×51)]=90×1=90

How about 48 times 23 plus 48 times 26 plus 51 times 48

Original formula = 48 × (23 + 26 + 51) = 48 × 100 = 4800