☆ 5 .
a) 600 - a = 243 .
a = 600 - 243 .
a = 357 .
b ) 9 × a = 27 .
a = 27 : 9 .
a = 3 .
c ) a : 7 = 56 .
a = 56 × 7 .
a = 392 .
☆ 6 .
a ) 700 - ( 324 + 152 ) =
700 - 476 = 224 .
b ) 36 : 4 × ( 500 - 424 ) =
36 : 4 × 76 =
9 × 76 = 684
# Gogoașa Ucigașă :-)
