1. Observă, apoi calculează:
a) 65 - (39+ 25) =
(613-316) + 104 =
1 281 - (175 + 192) - (9+ 404) =
c) (72:4) + (37 x 31) =
(3 x 27 -60):7 + 5 =
b) 8×(42:7)=
(54:9)×5=
10×(24:6):(2×4)=
d) 42+(28×13)-(93:3)=
45:(3×3)×8×(2×5)=
dau coroana!
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Răspuns:
a) 65-64=1
287+104= 391
1281 - 367 - 413= 914-413= 501
b) 8x6=48
6x5=30
10x4:8=40:8=5
c) 18+1.147=1.165
(81-60):7+5= 21:7+5=3+5=8
d)42+365-31=407-31=376
45:9x8x10=5x8x10=40x10=400
Succes!