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
9 × 10 = ______
57 + 20 = ______
22 + 20 = ______
48 + 20 = ______
45 − 10 = ______
86 − 10 = ______
90 − 10 = ______
6 × 10 = ______
46 + 10 = ______
92 − 10 = ______
59 − 10 = ______
82 − 10 = ______
51 + 10 = ______
50 + 10 = ______
47 − 10 = ______
54 + 20 = ______
3 × 10 = ______
42 + 10 = ______
69 − 10 = ______
24 + 20 = ______
