Matemáticas mentales Worksheet
Recommended for 1er grado — 5to grado
Matemáticas mentales Worksheet
Name: ____________________Date: ____________
Instructions: Usar estrategias mentales como sumar diez, duplicar y compensar para calcular rápidamente.
20 problems
39 + 20 = ______
6 × 10 = ______
70 − 10 = ______
35 − 10 = ______
3 × 10 = ______
63 − 10 = ______
33 + 20 = ______
88 + 20 = ______
82 − 10 = ______
40 − 10 = ______
9 × 10 = ______
51 + 10 = ______
21 + 20 = ______
49 − 10 = ______
58 + 20 = ______
4 × 10 = ______
83 − 10 = ______
24 + 20 = ______
34 − 10 = ______
86 + 10 = ______
