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Bună ziua as avea nevoie de ajutor nu reușesc sa ca. Aceste exerciti

Calculeaza
21-21:7x (4-5:5)=

19+(6x7-18)-2x9=

(8x9-4:2)-(91-9x9)=

100-(27+7x6-48:8):7=
​

Răspuns :

Lazarelias2007ask

Explicație pas cu pas:

21-21÷7×(4-5÷5)=

=21-3×(4-1)=

=21-3×3=

=21-9=

=12

19+(6×7-18)-2×9=

=19+(42-18)-18=

=19+24-18=

=43-18=

=25

(8×9-4÷2)-(91-9×9)=

=(72-2)-(91-81)=

=70-10=

=60

100-(27+7×6-48÷8)÷7=

=100-(27+42-6)÷7=

=100-(27+36)÷7=

=100-63÷7=

=100-9=

=91

Răspuns:

1.21-21÷7×(4-5÷5)=

=21-3×(4-1)=

=21-3×3=

=21-9=

=12

2.19+(6×7-18)-2×9=

=19+(42-18)-18=

=19+24-18=

=43-18=

=25

3.(8×9-4÷2)-(91-9×9)=

=(72-2)-(91-81)=

=70-10=

=60

4.100-(27+7×6-48÷8)÷7=

=100-(27+42-6)÷7=

=100-(27+36)÷7=

=100-63÷7=

=100-9=

=91

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