(1)(14.81+5.19)×(14.81-5.19)
=20×9.62
=192.4;
答:积是192.4;
(2)(126.8+15.7)×1.02
=142.5×1.02
=145.35;
答:积是145.35;
(3)(0.6×0.8+0.12)÷1.2,
=0.6÷1.2,
=0.5.
答:商是0.5.
(1)(14.81+5.19)×(14.81-5.19)
=20×9.62
=192.4;
答:积是192.4;
(2)(126.8+15.7)×1.02
=142.5×1.02
=145.35;
答:积是145.35;
(3)(0.6×0.8+0.12)÷1.2,
=0.6÷1.2,
=0.5.
答:商是0.5.