4. Сравни (>, =, <): 5+5+5+5 и 5·5; 3·4 и 3·3+3; 7+7+7 и 7·3; 9·5 и 9+9+9; 6·3+6 и 6·4; 8·8 и 9·8−8; 3+3+3 и 3·4; 25:5 и 5+5+5; 9·8 и 9·8; 4+4+4+4 и 10·2; 30:6 и 4·2; 7·3 и 2·9; 27:3 и 3·3; 10·2 и 5·4; 42:7 и 4·4; 4·2 и 5·3; 24:4 и 3·2; 7·8 и 9·6; 16:4 и 12:3; 9·5 и 8·6.

Вычислим значения выражений и сравним пары.

5+5+5+5 = 20 < 25 = 5·5; 3·4 = 12 = 12 = 3·3+3; 7+7+7 = 21 = 21 = 7·3; 9·5 = 45 > 27 = 9+9+9; 6·3+6 = 24 = 24 = 6·4; 8·8 = 64 = 64 = 9·8−8; 3+3+3 = 9 < 12 = 3·4; 25:5 = 5 < 15 = 5+5+5; 9·8 = 72 = 72 = 9·8; 4+4+4+4 = 16 < 20 = 10·2.

30:6 = 5 < 8 = 4·2; 7·3 = 21 > 18 = 2·9; 27:3 = 9 = 9 = 3·3; 10·2 = 20 = 20 = 5·4; 42:7 = 6 < 16 = 4·4; 4·2 = 8 < 15 = 5·3; 24:4 = 6 = 6 = 3·2; 7·8 = 56 > 54 = 9·6; 16:4 = 4 = 4 = 12:3; 9·5 = 45 < 48 = 8·6.