1. 在○里填上“＞”或“＜”。
①$7.5×1.3$○$7.5$
②$4.6×0.9$○$4.6$
③$8.1×2.1$○$8.1$
④$0.95×0.8$○$0.95$
⑤$6.67×0.6$○$6.67$
⑥$8.32×1.1$○$8.32$
⑦$0.58×1.01$○$0.58$
⑧$1.96×0.8$○$1.96$
⑨$1.03×0.56$○$0.56$
⑩$0.03×0.42$○$0.42$
⑪$0.25×4.04$○$4.04$
⑫$1.25×0.8$○$1.25$
⑬$8.5×1.2$○$8.5$
⑭$4.2×0.7$○$4.2$
⑮$9.1×1.5$○$9.1$
⑯$3.7×0.9$○$3.7$
⑰$5.6×1.1$○$5.6$
⑱$2.9×0.8$○$2.9$
⑲$7.8×1.3$○$7.8$
⑳$6.3×0.6$○$6.3$

①$7.5×1.3$＞$7.5$
②$4.6×0.9$＜$4.6$
③$8.1×2.1$＞$8.1$
④$0.95×0.8$＜$0.95$
⑤$6.67×0.6$＜$6.67$
⑥$8.32×1.1$＞$8.32$
⑦$0.58×1.01$＞$0.58$
⑧$1.96×0.8$＜$1.96$
⑨$1.03×0.56$＞$0.56$
⑩$0.03×0.42$＜$0.42$
⑪$0.25×4.04$＜$4.04$
⑫$1.25×0.8$＜$1.25$
⑬$8.5×1.2$＞$8.5$
⑭$4.2×0.7$＜$4.2$
⑮$9.1×1.5$＞$9.1$
⑯$3.7×0.9$＜$3.7$
⑰$5.6×1.1$＞$5.6$
⑱$2.9×0.8$＜$2.9$
⑲$7.8×1.3$＞$7.8$
⑳$6.3×0.6$＜$6.3$

2.算一算,得数保留一位小数。
①$2.182×2≈$
②$2.26×4≈$
③$0.32×2.51≈$
④$21.3×0.4≈$
⑤$4.2×0.67≈$
⑥$0.18×4≈$
⑦$0.39×2.7≈$
⑧$3.85×5≈$
⑨$70.6×0.4≈$
⑩$9.4×1.6≈$
⑪$1.3×10.08≈$
⑫$0.43×6.1≈$
⑬$0.25×2.7≈$
⑭$0.68×0.6≈$
⑮$3.14×0.5≈$
⑯$28×0.07≈$
⑰$0.5×0.99≈$
⑱$6.728×0.34≈$
⑲$5.78×2≈$
⑳$9.5×4.76≈$
㉑$0.3×4.8≈$
㉒$3×0.25≈$
㉓$0.4×7.05≈$
㉔$0.64×0.38≈$
㉕$8.7×0.6≈$
㉖$6.6×2.4≈$
㉗$34.3×0.27≈$

①$2.182×2≈4.4$
②$2.26×4≈9.0$
③$0.32×2.51≈0.8$
④$21.3×0.4≈8.5$
⑤$4.2×0.67≈2.8$
⑥$0.18×4≈0.7$
⑦$0.39×2.7≈1.1$
⑧$3.85×5≈19.3$
⑨$70.6×0.4≈28.2$
⑩$9.4×1.6≈15.0$
⑪$1.3×10.08≈13.1$
⑫$0.43×6.1≈2.6$
⑬$0.25×2.7≈0.7$
⑭$0.68×0.6≈0.4$
⑮$3.14×0.5≈1.6$
⑯$28×0.07≈2.0$
⑰$0.5×0.99≈0.5$
⑱$6.728×0.34≈2.3$
⑲$5.78×2≈11.6$
⑳$9.5×4.76≈45.2$
㉑$0.3×4.8≈1.4$
㉒$3×0.25≈0.8$
㉓$0.4×7.05≈2.8$
㉔$0.64×0.38≈0.2$
㉕$8.7×0.6≈5.2$
㉖$6.6×2.4≈15.8$
㉗$34.3×0.27≈9.3$