(13) 24 times 2 (14) 47 times 3 (15) 56 times 6 (19) 35 times 3 (20) 64 times 6 (21) 67 times 7 (24) 90times 8=

(13) $24 \times 2 = 48$<br />(14) $47 \times 3 = 141$<br />(15) $56 \times 6 = 336$<br />(19) $35 \times 3 = 105$<br />(20) $64 \times 6 = 384$<br />(21) $67 \times 7 = 469$<br />(24) $90 \times 8 = 720$