四年级乘除法简便运算 500 道及答案 (1) .527+ 199 (2) .735- 198 (3) .105× 99 (4) .865- 198 (5) .75× 98 (6) 68× 99+ 68 (7) 63× 88+ 88× 37 (8) 58× 99+ 58 (9) 25× 49+ 75× 49 (10) 575- 78- 22 (11) 48× 89+ 48 (12) 367- 199 (13) 56× 102 (14) 75× 48+ 75× 52 (15) (20+ 4) × 25 (16) 99×11 (17) 32×(200+ 3) (18) 68×39+ 68 (19) 239×101 (20) 38×25×4 (21) 42×125×8 (22) (25×125) ×8×4 (23) 78×125×8×3 (24) (125×25) ×4 (25) (125+ 25) ×4 (26) 127+352+73+4 (27) 89+276+135+33 (28) 5+204+335+96 (29) 25+71+75+29 +88 (30) 243+89+111+57 (31) 399+ (154+ 201) (32)480+325+75 (33)78+53+47+2291+89+11 (34)36+18+64 (35)168+250+32 (36)85+41+15+59 (37)78+46+154 (38)130-46-34 (39)263-96-104 (40)970-132-68 (41)400-185-15 (42)472-126-124 (43)168-28-72 (44)437-137-63 (45)244+182+56 (46)951-395 (47)19+199+1999 (48) 34+304+3004 (49) 798+321 (50) 325-156+675-144 (51) 8+98+998+9998 (52) 99999+9999+999+99+9+4 (53) 44+ 37+ 56 (54) 163+ 49+ 261 (55) 74+ (137+ 326) (56) 249+ 402 (57) 189+ 35+ 211+ 165 (58) 483- 236- 64 (59) 582- 157- 182 (60) 65× 5× 2 (61) 15× 23× 4 (62) 36× 25 (63) 25× 125× 32 (64) 35×22 (65) 5×(63×2) (66) 540÷45÷2 (67) 540÷36 (68) 216+ 305 (69) 25×32 (70) 47+ 236+ 64 (71) 6×(15×9) (72) 402+ 359 (73) 43+ 78+ 122+ 257 (74) 25×(26×4) (75) 25×44 (76) 354+ (229+ 46) (77) 25×(4×12) (78) 25×(4+12) (79) 64×64+ 36×64 (80) 99×99+99 49×99+49 (81) 49×99+49 (82) a+ b = b+ a 88+ 56+ 12 178+ 350+ 22 56+ 208+ 144 (83) (a+ b)+ c= a+ (b+ c) (23+ 56)...