Question

AJUTOR
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Answer 1

Răspuns:

12.

a)64:8+3=8+3=>11

25-8:2=25-4=>21

16+6:3=16+2=>18

70:10×4=7×4=>28

b) 40-60:1×0=40-60×0=40+0=>40

36+15:5×1=36+3×1= 36+3=>39

21:3+72:9=7+8=>15

53-25:5-29=53-5-29=48-29=>19

13.

a) 1. (8+19):3=27:3=>9

2. 49:(3+4)=49:7=>7

3. (5:5+5:1)+(30:10)=(1+5)+3=6+3=>9

b)1. (28:4-6)×(7×9×-60)=(7-6)×(63-60)=1×3=>3

2.(23-12:3×0)+(7×8-4×4)=(23-4×0)+(56-16)=(23-0)+40=23+40=>63

3. (64-24):4×5-(6×8×1)=40:4×5-48=10×5-48=50-48=>2

4. 100:10×0:7+40:5= 10×0:7+8=0:7+8=0+8=>8

c)1. 23+(8×8+6×6):10×2=23+(64+36):10×2=23+100:10×2= 23+10×2= 23+20=>43

2. (6+8:4-20:5×3 +6×7:1)-(18:3:3+32:8)=(6+2-2×3+42:1)-(6:3+4)= (6+2-6+42)-(2+4)=(8-6+42)-6=(2+42)-6)=44-6=>38

3. (8×7+7×7-6×7)-(24:3+80:8+35:7)=(56+49+42)-(8+10+5)=(105+42)-(18+5)=147-25=>122

4.(9×3:3+40:8):2+899)=(27:3+5):2+899=(9+5):2+899=14:2+899=7+899=>906

5. (64:8:2+3×10:6)×(63:7-24:6)+378)=(8:2+30:6)×(9-4)+378=(4+5)×5+378=20×5+378=100+378=>478

14. 15-15:5+5=15-3+5=12+5=>17

15. 3+3×7=42

Va fi: (3+3)×7=42

5+5:5+5=1

Va fi: (5+5):(5+5)=1

6+6-6+6=0

Va fi: (6+6)-(6+6)=0