Question

5 Calculează: a) 7 x 8 + 6 x 7-3 x 7; 9 + 5 X 6 - 25:5; b) 7×6-12 + 7 x 10; 15 - 15: 3 + 2 x 5 x 5; c)400 + 5 x 8 + 72:9-48; 300 - 64:8 + 6 x 6 - 28​

Answer 1

a) 7×8 + 6×7- 3 ×7= 56+ 42- 21= 77

9+ 5×6 - 25:5= 9+30-5=34

b) 7×6-12 + 7×10 = 42-12 +70=30+70=100

15-15 :3 +2×5×5= 15-5 + 10×5= 10+50=60

c) 400 + 5×8 + 72:9-48= 400 + 40+8-48= 48

300- 64:8 + 6×6 -28= 300- 8 + 36 -28= 300