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ajutati maaaa va rog dau coroana ex 4 si 5

Ajutati Maaaa Va Rog Dau Coroana Ex 4 Si 5 class=

Răspuns :

Binee.
Exercitiul 4

72:8x7-59=
72:8=9
9x7=63-59=4

80-81:9x5=
 81:9=9
9x5=45
80-45=35 

 exercitiul 5 
90-(35+7):6=
(35+7)=42
42:6=7
90-7=83
 
(39+24):7+18=
(39+24)=63
63:7=9
9+18=27

3x(64-56) +(72-36):4=
rezolvam din paranteza
64-56=8
72-36=36
3x8=24
36:4=9
24+9=33










4)72÷8×7-59=
=9×7-59
=63-59
=4

80-81÷9×5=
=80-9×5
=80-45
=35

35+35÷7×9=
=35+5×9
=35+45
=80

100-42÷6×9-6×5÷10=
=100-63-3
=100-60
=40

25+54÷6÷3×10-49÷7×4=
=25+9÷3×10-7×4
=25+3×10-28
=25+30-28
=25+2
=27

5)
90-(35+7)÷6=
=90-42÷6
=90-7
=83

(39+24)÷7+18=
=63÷7+18
=9+18
=27

3×(64-56)+(72-36)÷4=
=3×8+36÷4
=24+9
=33