1.25/40 и 24/40
2.4/21 и 6/21
3.45/110 и 28/110
4. 666/5775 и 242/5775
1)5*2=10(м)
2)22-10=12(м)
3) 12:2=6(м)
4)10*6=60(м2)
Ответ:60 м2
1) 256 - 156 + 343 = 100 + 343 = 443
2) 384 + (237 - 137) = 384 + 100 = 484
3) 495 - 295 - 157 = 200 - 157 = 43
4) 929 - 129 - 498 = 800 - 498 = 302
33 - (6+13) - (7+11) - 9 = -13
1) 6+13=19
2) 7+11=18
3) 33-19=14
4) 14-18=-4
5) -4-9=-13