Question

Помогите с математикой​

Answer 1

Пошаговое объяснение:

2 1/4 ×1 1/7 ×4×7=(9/4 ×4)×8/7 ×7)=9×8=72

3,81×4,3+6,19×4,3=4,3×(3,81+6,19)=4,3×10=43

(4- 3/10 -1/5)×10=(4-0,3-0,2)×10=3,5×10=35

6 2/11 ×5 1/8 +1 9/11 ×5 1/8=41/8(68/11 +20/11)=41/8 ×88/11=41/8 ×8=41

(8/21 +1/3 -5/7)×21=(8/21 +7/21 -15/21)×21=0/21 ×21=0