92b (13) 24 times 2 (14) 47 times 3 (15) 56 times 6 (16) 89 times 7 (17) 86 times 9 (18) 61times 7= (20) 64 times 6 (21) 67 times 7 (23) 78 times 9 (24) 90times 8=

Vamos corrigir e resolver as multiplicações:

(18) $61 \times 7 = 427$

(20) $64 \times 6 = 384$

(21) $67 \times 7 = 469$

(23) $78 \times 9 = 702$

(24) $90 \times 8 = 720$

Portanto, as respostas corretas são:

(18) $61 \times 7 = 427$

(20) $64 \times 6 = 384$

(21) $67 \times 7 = 469$

(23) $78 \times 9 = 702$

(24) $90 \times 8 = 720$