Question

математика 3 класс помогите пожалуйста ​

Answer 1

$(4 {}^{2} + {7}^{2} ) \div 5 = (4 \times 4 + 7 \times 7) \div 5 = (16 + 49) \div 5 = 65 \div 5 = 13 \\ (7 {}^{2} + 10 {}^{2} ) \times 6 = (7 \times 7 + 10 \times 10) \times 6 = (49 + 100) \times 6 = 149 \times 6 = 894 \\ 5 {}^{2} + 6 {}^{2} + 9 {}^{2} = 5 \times 5 + 6 \times 6 + 9 \times 9 = 25 + 36 + 81 = 142 \\ 8 \times (5 {}^{2} + 6 {}^{2} ) = 8 \times (5 \times 5 + 6 \times 6) = 8 \times (25 + 36) = 8 \times 61 = 488 \\ 10 {}^{2} - 3 {}^{2} + 8 {}^{2} = 10 \times 10 - 3 \times 3 + 8 + \times 8 = 100 - 9 + 64 = 164 - 9 = 155 \\ 9 {}^{2} { - (35 + 4 {}^{2} }) = 9 \times 9 - (35 + 4 \times 4) = 81 - (35 + 16) = 81 - 51 = 30$