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42:6+9x(7x7_5x8)= 26+(5x8_63:7+9x8)_100=

Răspuns :

42:6+9×(7×7-5×8)=
42:6+9×(49-5×8)=
42:6+9×(49-40)=
42:6+9×9=
7+9×9=
7+81=
88

26+(5×8-63:7+9×8)-100=
2+(40-63:7+9×8)-100=
2+(40-9+9×8)-100=
2+(40-9+72)-100=
2+(31+72)-100=
2+103-100=
2+3=
6
7 + 9 * (49 - 40) = 26 + ( 40 - 9 + 72) -100 = 7 + 81 = 26 + 31 +72-100 =
88 = 29