Question

4. Calculează, descompunand deimpărţitul convenabil, după modelul dat:

Model:
56:4 = (40 + 16): 4 =
40:4 + 16:4
= 10 + 4 =
: 14 model


a) 74: 2 =
65:5=
42:3 =
b) 78:6 =
91:7=
96:8=
c) 87: 3
92:2 =
92:4 =

Answer 1

Răspuns:

a) 74:2= (40+34):2=(40:2)+(34:2)=20+17=37

65:5=(50+15):5=(50:5)+(15:5)=10+3=13

42:3=(30+12):3=(30:3)+(12:3)=10+4=14

b) 78:6=(60+18):6=(60:6)+(18:6)=10+3=13

91:7=(70+21):7=(70:7)+(21:7)=10+3=13

96:8=(80+16):8=(80:8)+(16:8)=10+2=12

c) 87:3=(30+57):3=(30:3)+(57:3)=10+19=29

92:2=(50+42):2=(50:2)+(42:2)=25+21=46

92:4=(40+52):4=(40:4)+(52:4)=10+13=23

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