Question

Va rog faceti 1,4,5,7 si 8 pentru o coroana si 20 puncte ​

Answer 1

1.a)33+17=35+15

b)58-31=27

c)1995•1=1995

d)17•100=1700

4.a)316•2+18•316

632+5688=6320

b)150•21+750•21-12600

3150+15750-12600

18900-12600

6300

5.a)20+56=76

b){3•(9-2)+2}•5+17

(3•7+2)•5+17

(21+2)•5+17

23•5+17

115+17

132

145+47•{86•11-3•(121•5-28•16)}

145+47•{86•11-3•(605-448)}

145+47•(86•11-3•154)

145+47•(946-462)

145+47•484

145+22748

22893

7.a)347+206+443+194

553+443+194

996+194

1190

b)1+2+3+...+49+50

50×51÷2

2550÷2

1275

8. 737+345=1082

374•3=1122

1122-1082=40

Sper că te-am ajutat!｡◕‿◕｡