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a fost răspuns

Rezolvati in doua moduri: 10×(42-23)= (45-7+3)×100=

Răspuns :

Sanduurzica
Mod. 1
10x(42-23)=10x19=190
Mod. 2
10x(42-23)=10x42-10x23=420-230=190

Mod.1
(45-7+3)x100=41x100=4100
M0d. 2
(45-7+3)x100=45x100-7x100+3x100=4500-700+300=4100